Yeah, I mean I think this would be the same for any sports figure. It's not as much the controversy, more so there's so much visual evidence of it. As in, actual tapes of the incidents that are pretty widely seen. It's just bad PR in general.
I don't care about the 'gay' aspect of it, because that's his choice (not sure Kai's sexual orientation), never has bothered me personally, and honestly that's a huge section of the BB fandom. But he just made some bad career choices I feel, especially if is goal was Mr.O, which is based around a image to the public and stuff. Even if he had been in hetero porn or something, would probably still be difficult for him.